Higgs bosons of the NMSSM with explicit CP violation at the ILC

TL;DR

This paper investigates the production and decay of Higgs bosons in the NMSSM with explicit CP violation at the ILC, highlighting how CP phases influence cross sections and decay modes of neutral Higgs bosons.

Contribution

It provides a detailed analysis of how CP violation affects Higgs production and decay in the NMSSM at one-loop level, with implications for future collider experiments.

Findings

At least one Higgs boson can be produced with significant cross section at the ILC.

CP phases significantly influence Higgs production cross sections.

Decay widths and modes of Higgs bosons are affected by CP violation, differing from the Standard Model.

Abstract

We study the Higgs sector of the next-to-minimal supersymmetric standard model (NMSSM) with explicit CP violation at the one-loop level, where the radiative corrections due to the quarks and squarks of the third generation are taken into account. We expect that, within a reasonable region of the parameter space of the present model, at least one of five neutral Higgs bosons may be produced at the future $e^+ e^-$ International Linear Collider (ILC) with $\sqrt{s} = 500$ GeV, with cross section larger than 12 fb, 15 fb, and 1.5 fb, respectively, via the Higgs-strahlung process, the $WW$ fusion process, and the $ZZ$ fusion process. We find that the effect of the CP phase in the present model yields significant influences upon the production cross sections of the five neutral Higgs bosons. We also study the decay modes of the five neutral Higgs bosons to find that their decay widths are similarly affected by the CP phase. Some of the decay modes in the present model behave differently from those of the Standard Model.